Detailed description
2.12 Block descriptions
Basic logic functions: PLC basic program solution line (P3 sl)
158
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.12.7
FB 9: MtoN Control unit switchover
Description of Functions
This block allows switchover between several control units (HMI operator panel fronts and/or
MCP machine control panels), which are connected to one or more NCU control modules via
a bus system.
References:
/FB2/ Function Manual Extended Functions; Several Operator Panel Fronts on Several
NCUs, Distributed Systems (B3)
The interface between the individual control units and the NCU (PLC) is the M : N interface
in the data block DB 19, see
/FB2/ Function Manual Extended functions, Section "Data lists, Signal description".
FB 9 uses the signals of these interfaces.
Apart from initialization, sign-of-life monitoring and error routines, the following basic
functions are also performed by the block for control unit switchover:
Tabulated overview of functions:
Basic function
Significance
HMI queuing
HMI wants to go online with an NCU
HMI coming
HMI is connecting to an NCU
HMI going
HMI is disconnecting from an NCU
Forced break
HMI must break connection with an NCU
Operating focus changeover to
server mode
Change operating focus from one NCU to the other
Active/passive operating mode:
Operator control and monitoring/monitoring only
MCP switchover
As an option, MCP can be switched over with the HMI
Brief description of a few important functions
Active/passive operating mode:
An online HMI can operate in two different modes:
Active mode:
Operator can control and monitor
Passive mode:
Operator can monitor (HMI header only)
After switchover to an NCU, this initially requests active operating mode in the PLC of the
online NCU. If two HMI are connected online on one NCU simultaneously, one of the two is
always in active and the other in passive mode. The operator can request active mode on
the passive HMI at the press of a button.
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...